Resolution improvement from multiple images of a scene containing motion at fractional pixel values

Amélioration de la résolution à partir de plusieurs images d'une scène contenant des valeurs de mouvement inférieurs au pixel

Bildafulösungsverbesserung aus mehreren Bildern einer Szene die Unterpixelbewegungswerte enthält

Abstract

A high-resolution image (19) is derived from multiple low resolution images (16) each having an array of low-resolution pixels. Motion vectors (22) are derived at each of the unknown high-resolution grid points (20) for each of the multiple low-resolution images (16). One motion vector (22) is generated at each one of the high-resolution grid locations (20A) for each one of the multiple images (16). The motion vectors (22) at the high-resolution grid points (20) associate high-resolution grid points (20), whose values are unknown, with inter-pixel positions (24) on the associated low-resolution images (16). Low-resolution pixels are identified that have the closest distance to each inter-pixel position (24). One or several of the identified low-resolution pixels having the shortest distance are used to determine the pixel value at each one of the high-resolution grid points (20). Pixel intensity values are then mapped into the high-resolution grid points (20) according to the selected low-resolution pixels (16).

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